diff --git a/Gemfile.lock b/Gemfile.lock
index 8c19599..b9268ac 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     ansi (1.5.0)
     ast (2.4.0)
     aws-sdk (2.11.22)
@@ -130,7 +130,7 @@ GEM
       addressable
       css_parser (>= 1.6.0)
       htmlentities (>= 4.0.0)
-    public_suffix (3.0.2)
+    public_suffix (4.0.6)
     puma (3.11.3)
     rack (1.6.11)
     rack-ssl (1.4.1)